docs: def from_object(orm_class, engine, limit=None):
      """
      Select data from the table defined by a ORM class, and put into prettytable
  
      :param orm_class: an orm class inherit from
          ``sqlalchemy.ext.declarative.declarative_base()``
      :param engine: an ``sqlalchemy.engine.base.Engine`` object.
      :param limit: int, limit rows to return.
  
      **中文文档**
  
      将数据对象的数据放入prettytable中.
      """
      Session = sessionmaker(bind=engine)
      ses = Session()
      query = ses.query(orm_class)
      if limit is not None:
          query = query.limit(limit)
      result_proxy = execute_query_return_result_proxy(query)
      ses.close()
      return from_db_cursor(result_proxy.cursor)